Lasting machine



Oct. 25, 193s. J. w. BARNA 2,133,942

LASTING MACHINE Filed June 8, 1937 2 Sheets-Sheet 1 Patented Oct. 25, 1938 UNITED STATES PATENT OFFICE LASTING MACHINE Joseph W. Barna, Chicago, Ill. Application June 8, 1937, Serial No. 146,989

6 Claims.

My invention relates to lasting machines for pre-welt uppers, and its primary object is tq provide improved means for moving the lastingwipers in both directions between their preliminary spread position which enlarges the space between them for conveniently positioningl the Work in the machine, and their initial operative position underlying the welt to conform the welted edge of the upper to the contour of the sole of the last.

A practical embodiment of means for carrying out the invention is shown in the accompanying drawings, in which Fig. l is a vertical cross-sectional view of a last machine constructed in accordance with my invention with its parts in their relative positions when the wipers areV spread to permit a last with an upper in prelasted position thereon to be positioned on the last-jack; Fig. 2 is a similar view showing the parts in their positions when the wiprs are moved inwardly to lasting positions; Fig. 3 is detail sectional view on the line 3 3 in Fig. 2; Fig. 4 is a similar view on the line 4-4 in Fig. 3; Fig. 5 is a similar view on the line 5-5 in Fig. 1, and 25 Fig. 6 is a diagrammatic representation illustrating cli'erent positions of the last-Wipers.

The wiper-assembly may be of any suitable type but preferably is organized to engage the upper all around the last and to conform in all its posi-1 30 tions to the pattern of the style of the last selected. As shown the assembly` is of the type disclosed in my co-pending application for patent filed September 6, 1935, Serial Number 39,393, comprising sectional end-wipers having slipjoints between their sections, andside-wipers supported and operated by the end-wipers and having slip-joints therewith. In the lasting operation the wipers are set to conform to the contour or pattern of a selected style of last the sections of the end-wipers are moved widthwise of a shoe on the last in the machine into and away from their lasting positions, the side-Wipers being correspondingly moved by their supporting parts, and the end-wiper'units are moved lengthwise of the shoe on the last. The wiper operating parts are constructed to spread the wipers outwardly to their preliminary position to enlarge their intermediate opening both lengthwise and widthwise to afford room to permit a last with an i0 upper in pre-lasted position thereon to freely pass the wipers when being positioned on the lastjack in the plane of the Wipers, and then to move the wipers inwardly to their initial operating position under the welt, and then to close the wipers to position to last the upper by drawing and stretching it snug upon the body of the last, and laying its welted edge down upon the sole of the last. In common with said machine the lasting mechanism here illustrated has a base comprising an opposite pair of spaced angle bars I0' 5 having upper and lower Webs II and I2, the latter resting on a bench I3, and an intermediate longitudinal base plate I4 formed with front and rear bearings for the longitudinal through rods I5 on which the front and rear carriers I6 for the 10 wipers are slidably mounted to move toward and away from the center of the machine lengthwise of the baseplate by the action of a right and left hand screw-shaft I1 journalled in bearing blocks on the baseplate and operated by a hand-wheel l5 on its front end. Each section of the end-wipers is carried by a pair of posts on a carriage movable widthwise of the position of a shoe in the machine and consisting of a vertical pillar I8 and a standard I9 aredat its upper portion toward the cor- 20 responding end of the machine, the four carriages being arranged with their pillars grouped about the center of the machine and their standards extending in side pairs forwardly and rearwardly, each pillar and standard being internally screwthreaded to support a wiper-post 20. The carriages are slidably mounted on the `front and rear carriers to permit the sections of the end-wipers to move toward and away from each other widthwise of the position of a shoe in the machine by tongues 2| on the carriages engaging longitudinal key-ways 22 in the sides of the carriers. The pillar of each carriage is movably connected by a lateral arm 23 and saddle 24 to an angular guideplate 25 adjustably mountedon blocks 26 running 35 widthwise in ways in a lateral slide-table 21 and connected thereto by adjusting screws 28. The slide-tables move widthwise of the machine in key-ways in the webs II, and move the wipercarriages to move the wipers in both directions between their preliminary spread position and their initial operating position against the seam of the welt. Each table is operated by a togglelever 29 which is pivoted at its outer end to the web I I and at its inner end to a depending ear 310 on the inner side of the table. By pulling the levers down as in Fig. 1 the tables are moved outwardly to spread the wipers to their open positions, and by pushing the levers up as in Fig. 5o 2 the tables are moved inwardly to retract the wipers toward the longitudinal center of machine to their initial operating position underlying the welt and bringing the welted-edge of the upper into approximate alinement with the edge of the last, the levers being operated by push and pull links 3|.

The organization and operation of the parts so far described are similar to those of the corresponding parts of the machine described in my said application. In using machines of this type the work is positioned inside the spread wipers with the edge ofthe welt more or less out-turned or flared away from the upper so that the wipers may pass under its edge, but under the most favorable conditions the wipers in moving into the gradually reduced crease leading to the weltseam necessarily drag on the work as the latter offers increased resistance as they approach the seam, and so considerable power is required for this operation. On the other hand, the retraction of the wipers to their spread position after being withdrawn from the welt-seam,when the lasting operation is completed is easily accomplished by less power.

To facilitate the inward movement of the wipers to the welt-seam and increase the speed of the machine, I provide a treadle-mechanism which affords relatively long,r leverage and great.

power to push the toggle-levers 29 up to move the wipers into position against the welt-seam, and a shorter leverage of less power to draw the levers down to spread the wipers.

In the organization shown the push and pull links 3| are pivoted to a cross-bar 32 having vertical reciprocation in opposite elongated slots 33 in a bell-shaped bearing 34 which is bolted to the webs I2. The bar is operated by a plunger 35 reciprocating in a bore in the neck of the bearing and is pivotally connected by a suitable link 36 to the short arm of a treadle 31 which is pivoted oiI its center in a standard 38 having a base 39 resting on the floor below the work-bench. The short arm of the treadle 31 has a pivoted depending bracket 40 which carries at its lower end a foot-pedal 4I, and the long arm of the treadle has at its outer end a similar pivoted depending bracket 42 having a foot-pedal 43; the brackets are curved at their pivoted ends to project under the treadle so that when the latter is swung they contact with it to limit their movement to an arc which preserves the pedals in horizontal position. The bracket 40 carries an adjustable set-screw 44 in its lower end to control and regulate the throw of the treadle 31 to adjust the extent of the movement of the slide-tables to spread the wipers to different preliminary positions, the screw being held by a setnut 45. When the pedal 4| is depressed to spread the wipers the screw abuts against the oor on which the base 39 rests; when the lasts vare o! large sizes, as for mens shoes, the screw is set upso that the spread of the wiper is extended, and when the lasts are of smaller sizes, as for childrens shoes, the screw is set down so that it reaches the iloor sooner and the wiper spread is lessened.

The long arm of the treadle affords suiiicient leverage and increased power to shift the wipers from their preliminary open position to their initial operative position underlying the welt, and so enables the operator easily to overcome the increasing resistance presented by the work to the inward movement of the wipers as they approach the welt-seam. The spread of the wipers after the lasting operation is easily accomplished by the shorter leverage of the pedal 4|.

In using the machine the wipers are set to the contour of the selected style of the lasts, the stop 44 is set, the screw-shaft is turned contra-clockwise to move the carriers I6 outwardly lengthwise of the machine, the Wipercarriages then being slightly retracted widthwise on the carriers by the angular plates 25, and the pedal 4| is depressed as shown in Fig. 1 to spread the wipers to their open position, indicated graphically bythe line a in Fig. 6. The last with its loose upper is positioned on the lastjack, with the edge of the welt ilared away from the upper. 'I'he shaft Il is turned clockwise to advance the end-wiper units slightly inwardly, and the pedal 43 is depressed all the way down as shown in Fig. 2 to advance al1 the wipers inwardly under the welt and up to position against the welt-seam, indicated graphically by the line b in Fig. 6; this initial movement of the wipers conforms the welted edge of the upper all around the last to the contour of the sole of the last and trucs-up the latter to the position of the wipers. The shaft l1 is then rotated clockwise to move the carriers inwardly toward each other to advance the end-wipers lengthwise of the shoe, and the wiper-carriages are moved inwardly on the carriers by the plates 25 to advance the sections of the end-wipers and the side-wipers widthwise of the shoe, thus bringing all the wipers into closed position, indicated by the line c in Fig. 6, to stretch and last the upper upon the body of the last and wipe the welted edge of the upper onto the sole of the last. The parts may remain in this relation until the outer sole is secured to the upper. To remove the shoe the operator rotates the screw-shaft contra-clockwise, then presses the pedal 4| as far down as it can go, and removes the shoe. The leverage of the retracting arm of the treadle is suflicient to quickly spread the wipers to their full open position, and the relatively longer leverage of its advancing arm aords sufficient power to enable the operator to easily overcome the resistance of the work to the passage of the wipers under the welt and quickly position them at the welt-seam. The differences of leverage of the treadle enable it to apply different power to the wipers for the purposes above set forth, andthe term diierential treadle is used herein to mean a treadle capable of exerting or applying such diierent power.

I claim:

1. In a lasting machine, a Wiper-assembly comprising sectional end-wipers and side-wipers, means for effecting relative movements of the' end-wiper sections and the side-wipers widthwise of the position of a shoe in the machine between their spread position and their inner lasting position, and treadle-mechanism for actuating said means comprising a diierential treadle and foot-pedals carried on the treadle.

2. In a lasting machine, a wiper-assembly comprising sectional end-wipers and side-wipers, means for effecting relative movements of the end-wiper sections and the side-wipers toward and away from each other widthwise of the position of a shoe in the machine, a treadle for eiIecting movements of said means in opposite directions, foot-pedals pivoted on the treadle at different distances on opposite sides of its axis, and an adjustable stop carried by the pedal having the shorter leverage.

3. In a lasting machine, a wiper-assembly comprising sectional end-wipers and side-wipers, means including toggle-joints' for effecting relative movements of the end-wiper sections and the side-wipers toward and away from each other widthwise of the position of a shoe in the machine between their spread position and their l75 inner lasting position, a differential treadle, actuating connections between the short arm of the treadle and said toggle-joints, and footpedals on the arms of the treadle.

4. In a.- lasting machine, a wiper-assembly com- Vprising sectional end-wipers and side-wipers,

means including toggle-joints for effecting relative movements of the end-wiper sections vand side-wipers toward and away from each f ating movement opens said toggle-joints.

5. In a. lasting machine, a wiper-assembly comprising sectional end-wipers and side-wipers, means for eilecting relative movements of the end-wiper sections and side-wipers toward and away from each other widthwise of the position of a shoe in the machine, a diierential treadle, operating connections between the short arm of the treadle and said means, and pedal-brackets pivoted to the arms of the treadle and extending thereunder in position to limit their swing.

6. In a lasting machine, opposite pairs of.

Wiper-carriages, actuating slides for effecting relative movements of said pairs of carriages toward and away from each other widthwise oi' the position of a shoe in the machine between their spread position and their inner lasting posif JOSEPH W. BARNA. 

